CN112527557A - Data recovery method, device and equipment and computer readable storage medium - Google Patents
Data recovery method, device and equipment and computer readable storage medium Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 10
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
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Abstract
The invention discloses a data recovery method, which comprises the following steps: acquiring current state information of a target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block. The data recovery method provided by the invention greatly saves time cost, improves data recovery efficiency and reduces the influence on related services in the nodes. The invention also discloses a data recovery device, equipment and a storage medium, and has corresponding technical effects.
Description
Technical Field
The present invention relates to the field of storage technologies, and in particular, to a data recovery method, apparatus, device, and computer-readable storage medium.
Background
In the running process of a computer node, frequent data block read-write operation exists, data loss is inevitable in the frequent read-write operation, and when the data loss occurs, the data block needs to be recovered to ensure that the service related to the data block runs normally.
At present, data recovery is mostly performed by reading and writing the whole data block from the beginning, a large-scale node cluster usually has hundreds of nodes, when the number of the nodes with lost data blocks is large, a large amount of time cost is needed, the data recovery efficiency is low, and normal operation of related services in the nodes is affected.
In summary, how to effectively solve the problems of low efficiency, high time cost, influence on normal operation of related services in nodes, and the like of the existing data recovery mode is a problem that needs to be solved urgently by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a data recovery method, which greatly saves time cost, improves data recovery efficiency and reduces the influence on related services in nodes; another object of the present invention is to provide a data recovery apparatus, a device and a computer-readable storage medium.
In order to solve the technical problems, the invention provides the following technical scheme:
a method of data recovery, comprising:
acquiring current state information of a target data block;
judging whether the current state information is in a normal state or not;
if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the snapshot data block set is stored with all snapshot data blocks obtained by performing snapshot operation on the target data block according to a preset modification step length;
and performing recovery operation on the target data block by using the latest snapshot data block.
In a specific embodiment of the present invention, obtaining the current state information of the target data block includes:
acquiring an actual MD5 value of the target data block;
judging whether the current state information is in a normal state or not, including:
acquiring a preset MD5 value;
and judging whether the actual MD5 value is consistent with the preset MD5 value.
In a specific embodiment of the present invention, performing a recovery operation on the target data block by using the latest snapshot data block includes:
acquiring a target stage operation log corresponding to the target data block from the latest snapshot data block;
and performing corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
In a specific embodiment of the present invention, after performing a recovery operation on the target data block by using the latest snapshot data block, the method further includes:
acquiring target state information of the restored data block;
judging whether the target state information is in the normal state or not;
and if so, carrying out snapshot operation on the restored data block to obtain a target snapshot data block.
In a specific embodiment of the present invention, after obtaining the target snapshot data block, the method further includes:
adding the target snapshot data block to the set of snapshot data blocks;
and performing data block clipping operation according to the adding sequence of each snapshot data block in the snapshot data block set.
A data recovery apparatus comprising:
the information acquisition module is used for acquiring the current state information of the target data block;
the judging module is used for judging whether the current state information is in a normal state or not;
the data block searching module is used for searching the latest snapshot data block corresponding to the target data block from the snapshot data block set when the current state information is determined to be in an abnormal state; the snapshot data block set is stored with all snapshot data blocks obtained by performing snapshot operation on the target data block according to a preset modification step length;
and the data block recovery module is used for performing recovery operation on the target data block by using the latest snapshot data block.
In a specific embodiment of the present invention, the information obtaining module is specifically a module for obtaining an actual MD5 value of the target data block;
the judging module comprises:
the value acquisition submodule is used for acquiring a preset MD5 value;
and the judgment submodule is used for judging whether the actual MD5 value is consistent with the preset MD5 value.
In a specific embodiment of the present invention, the data block recovery module includes:
the log obtaining submodule is used for obtaining a target stage operation log corresponding to the target data block from the latest snapshot data block;
and the data block recovery submodule is used for performing corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
A data recovery apparatus comprising:
a memory for storing a computer program;
a processor for implementing the steps of the data recovery method as described above when executing the computer program.
A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the data recovery method as set forth above.
The data recovery method provided by the invention obtains the current state information of the target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block. And carrying out snapshot operation on the target data block according to the preset modification step length by presetting the modification step length, and selecting the latest snapshot data block to carry out recovery operation on the target data block when the current state information of the target data block is determined to be in an abnormal state. Compared with the existing data recovery mode of re-reading and writing the target data block from the beginning, the method and the device greatly save time cost, improve data recovery efficiency and reduce the influence on related services in the node.
Accordingly, embodiments of the present invention further provide a data recovery apparatus, a device, and a computer-readable storage medium corresponding to the data recovery method, which have the above technical effects and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an implementation of a data recovery method according to an embodiment of the present invention;
FIG. 2 is a flow chart of another embodiment of a data recovery method according to the present invention;
FIG. 3 is a block diagram of a data recovery apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of a data recovery device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a flowchart of an implementation of a data recovery method according to an embodiment of the present invention, where the method may include the following steps:
s101: and acquiring the current state information of the target data block.
With the continuous modification of the target data block in the running process of the computer node, the data length and the content of the target data block can change along with the continuous modification, and the current state information of the target data block is obtained.
The target data block is any data block in the node.
S102: and judging whether the current state information is in a normal state, if so, not processing, and if not, executing the step S103.
After the current state information of the target data block is acquired, whether the current state information is in a normal state is judged, if yes, it is indicated that data loss or tampering does not occur, processing is not performed, if not, it is indicated that data may be lost or tampered, and step S103 is executed.
For example, the current state information of the data block may be current data length information, and whether the current state information of the target data block is normal is determined according to the data length information.
S103: searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the snapshot data block set stores all snapshot data blocks obtained by performing snapshot operation on a target data block according to a preset modification step length.
And obtaining a modification step length for performing snapshot operation on the target data block through machine learning training, and obtaining a preset modification step length, wherein if the preset modification step length obtained through training is 5, the data snapshot operation is performed after each pair of target data blocks are modified for 5 times. And performing snapshot operation on the target data block according to a preset modification step length to obtain a snapshot data block set consisting of all snapshot data blocks. And when the current state information is determined to be in an abnormal state, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set. The latest snapshot data block is the snapshot data block which is generated finally according to the sequence of the generation of the snapshot data blocks.
After determining that the current state information of the target data block is in an abnormal state, further analysis may be performed on the target data block, such as a data block usage rate, a data block loss rate, a number of erroneous tasks in a task performed on the target data block, and so on, so as to further infer the current state information of the target data block.
S104: and performing recovery operation on the target data block by using the latest snapshot data block.
And after the latest snapshot data block corresponding to the target data block is found from the snapshot data block set, performing recovery operation on the target data block by using the latest snapshot data block. Namely, the latest snapshot data block is used for data restoration according to the operation record. Compared with the existing data recovery mode of re-reading and writing the target data block from the beginning, the method and the device have the advantages that the snapshot operation is carried out on the target data block in advance according to the fixed-length modification times, the target data block is recovered by using the latest snapshot data block, the time cost is greatly saved, the data recovery efficiency is improved, the major data loss risk is avoided, and the influence on the related business in the node is reduced. The cluster disaster tolerance and fault tolerance efficiency is greatly improved, developers and operation and maintenance personnel only need to pay attention to the logic of the service to construct resources, and do not need to pay attention to restoration and fault tolerance adjustment, the operation and maintenance trouble is greatly reduced, and the development efficiency is improved.
The data recovery method provided by the invention obtains the current state information of the target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block. And carrying out snapshot operation on the target data block according to the preset modification step length by presetting the modification step length, and selecting the latest snapshot data block to carry out recovery operation on the target data block when the current state information of the target data block is determined to be in an abnormal state. Compared with the existing data recovery mode of re-reading and writing the target data block from the beginning, the method and the device greatly save time cost, improve data recovery efficiency and reduce the influence on related services in the node.
It should be noted that, based on the first embodiment, the embodiment of the present invention further provides a corresponding improvement scheme. In the following embodiments, steps that are the same as or correspond to those in the first embodiment may be referred to each other, and corresponding advantageous effects may also be referred to each other, which are not described in detail in the following modified embodiments.
Example two:
referring to fig. 2, fig. 2 is a flowchart of another implementation of a data recovery method in an embodiment of the present invention, where the method may include the following steps:
s201: the actual MD5 value for the target data block is obtained.
The state information of the target data block can be characterized by the MD5 value, and the actual MD5 value of the target data block is obtained.
S202: a preset MD5 value is obtained.
And setting the MD5 value of the target data block in advance, and acquiring a preset MD5 value.
S203: and (4) judging whether the actual MD5 value is consistent with the preset MD5 value, if so, not processing, and if not, executing the step S204.
After the actual MD5 value of the target data block and the preset MD5 value are obtained, it is determined whether the actual MD5 value is consistent with the preset MD5 value, if so, it indicates that data loss or tampering has not occurred, and no processing is performed, otherwise, it indicates that data may be lost or tampered, and step S204 is performed.
S204: searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the snapshot data block set stores all snapshot data blocks obtained by performing snapshot operation on a target data block according to a preset modification step length.
S205: and acquiring a target stage operation log corresponding to the target data block from the latest snapshot data block.
Recording the operation steps of the target data block in each stage in advance to obtain operation logs corresponding to each stage respectively. And after the latest snapshot data block corresponding to the target data block is found from the snapshot data block set, acquiring a target stage operation log corresponding to the target data block from the latest snapshot data block.
S206: and performing corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
And after a target stage operation log corresponding to the target data block from the latest snapshot data block is acquired, performing corresponding operation on the latest snapshot data block according to the target stage operation log, so as to recover the target data block.
S207: and acquiring target state information of the restored data block.
And performing corresponding operation on the latest snapshot data block according to the target stage operation log, recovering the target data block to obtain the restored data block, and then acquiring the target state information of the recovered restored data block.
S208: and judging whether the target state information is in a normal state, if not, executing step S209, and if so, executing step S210.
After the target state information of the restored data block obtained by recovery is acquired, whether the target state information is in a normal state is determined, if not, it indicates that the current latest snapshot data block may be damaged, step S209 is executed, if so, it indicates that the data recovery is successful, and step S210 is executed.
S209: and determining the last snapshot data block of the latest snapshot data block as the latest snapshot data block according to the adding sequence of the snapshot data blocks in the snapshot data block set, and repeatedly executing the step S205.
When it is determined that the target state information of the restored data block obtained by the restoration is in an abnormal state, which indicates that the current latest snapshot data block may be damaged, the last snapshot data block of the latest snapshot data block is determined as the latest snapshot data block according to the addition sequence of the snapshot data blocks in the snapshot data block set, and step S205 is repeatedly executed. The target data block is finally restored by searching all levels of snapshot data blocks according to the adding sequence of all the snapshot data blocks in the snapshot data block set, so that the deep blood margin fixed-length restoration of the data is realized.
S210: and carrying out snapshot operation on the restored data block to obtain a target snapshot data block.
And when the target state information of the restored data block obtained by restoration is determined to be in a normal state, indicating that the data restoration is successful, and carrying out snapshot operation on the restored data block to obtain a target snapshot data block.
S211: and adding the target snapshot data block into the snapshot data block set.
And after the snapshot operation is carried out on the restored data block to obtain a target snapshot data block, adding the target snapshot data block into the snapshot data block set.
S212: and performing data block clipping operation according to the adding sequence of each snapshot data block in the snapshot data block set.
After the target snapshot data block is added into the snapshot data block set, data block cutting operation is carried out according to the adding sequence of each snapshot data block in the snapshot data block set, so that low redundancy of each snapshot data block in the snapshot data block set is guaranteed, storage space is saved, and system performance is improved.
The present embodiment is different from the first embodiment corresponding to the technical solution claimed in independent claim 1, and the technical solutions claimed in dependent claims 2 to 5 are added, and of course, according to different practical situations and requirements, the technical solutions claimed in the dependent claims can be flexibly combined on the basis of not affecting the completeness of the solutions, so as to better meet the requirements of different use scenarios.
Corresponding to the above method embodiments, the embodiments of the present invention further provide a data recovery apparatus, and the data recovery apparatus described below and the data recovery method described above may be referred to correspondingly.
Referring to fig. 3, fig. 3 is a block diagram of a data recovery apparatus according to an embodiment of the present invention, where the apparatus may include:
an information obtaining module 31, configured to obtain current state information of the target data block;
a judging module 32, configured to judge whether the current state information is in a normal state;
the data block searching module 33 is configured to search, when it is determined that the current state information is an abnormal state, a latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set;
and a data block recovery module 34, configured to perform a recovery operation on the target data block by using the latest snapshot data block.
The data recovery device provided by the invention acquires the current state information of the target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block. And carrying out snapshot operation on the target data block according to the preset modification step length by presetting the modification step length, and selecting the latest snapshot data block to carry out recovery operation on the target data block when the current state information of the target data block is determined to be in an abnormal state. Compared with the existing data recovery mode of re-reading and writing the target data block from the beginning, the method and the device greatly save time cost, improve data recovery efficiency and reduce the influence on related services in the node.
In an embodiment of the present invention, the information obtaining module 31 is specifically a module for obtaining an actual MD5 value of the target data block;
the judging module 32 includes:
the value acquisition submodule is used for acquiring a preset MD5 value;
and the judgment submodule is used for judging whether the actual MD5 value is consistent with the preset MD5 value.
In one embodiment of the present invention, the data block recovery module 34 includes:
the log obtaining submodule is used for obtaining a target stage operation log corresponding to the target data block from the latest snapshot data block;
and the data block recovery submodule is used for carrying out corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
In a specific embodiment of the present invention, the information obtaining module 31 is further configured to obtain target state information of the restored data block obtained by recovery;
the judging module 32 is further configured to judge whether the target state information is in a normal state;
the apparatus may further include:
and the data snapshot module is used for carrying out snapshot operation on the restored data block to obtain a target snapshot data block when the target state information is determined to be in a normal state.
In one embodiment of the present invention, the apparatus may further include:
the data block adding module is used for adding the target snapshot data block into the snapshot data block set after the target snapshot data block is obtained;
and the data block cutting module is used for cutting the data blocks according to the adding sequence of the snapshot data blocks in the snapshot data block set.
Corresponding to the above method embodiment, referring to fig. 4, fig. 4 is a schematic diagram of a data recovery device provided in the present invention, where the device may include:
a memory 41 for storing a computer program;
the processor 42, when executing the computer program stored in the memory 41, may implement the following steps:
acquiring current state information of a target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block.
For the introduction of the device provided by the present invention, please refer to the above method embodiment, which is not described herein again.
Corresponding to the above method embodiment, the present invention further provides a computer-readable storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the steps of:
acquiring current state information of a target data block; judging whether the current state information is in a normal state; if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the method comprises the steps that a snapshot data block set is stored, wherein each snapshot data block obtained by performing snapshot operation on a target data block according to a preset modification step length is stored in the snapshot data block set; and performing recovery operation on the target data block by using the latest snapshot data block.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
For the introduction of the computer-readable storage medium provided by the present invention, please refer to the above method embodiments, which are not described herein again.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device, the apparatus and the computer-readable storage medium disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A method for data recovery, comprising:
acquiring current state information of a target data block;
judging whether the current state information is in a normal state or not;
if not, searching the latest snapshot data block corresponding to the target data block from the snapshot data block set; the snapshot data block set is stored with all snapshot data blocks obtained by performing snapshot operation on the target data block according to a preset modification step length;
and performing recovery operation on the target data block by using the latest snapshot data block.
2. The data recovery method of claim 1, wherein obtaining current state information of the target data block comprises:
acquiring an actual MD5 value of the target data block;
judging whether the current state information is in a normal state or not, including:
acquiring a preset MD5 value;
and judging whether the actual MD5 value is consistent with the preset MD5 value.
3. The data recovery method of claim 1, wherein performing a recovery operation on the target data block using the latest snapshot data block comprises:
acquiring a target stage operation log corresponding to the target data block from the latest snapshot data block;
and performing corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
4. The data recovery method according to any one of claims 1 to 3, further comprising, after performing a recovery operation on the target data block using the latest snapshot data block:
acquiring target state information of the restored data block;
judging whether the target state information is in the normal state or not;
and if so, carrying out snapshot operation on the restored data block to obtain a target snapshot data block.
5. The data recovery method of claim 4, further comprising, after obtaining the target snapshot data block:
adding the target snapshot data block to the set of snapshot data blocks;
and performing data block clipping operation according to the adding sequence of each snapshot data block in the snapshot data block set.
6. A data recovery apparatus, comprising:
the information acquisition module is used for acquiring the current state information of the target data block;
the judging module is used for judging whether the current state information is in a normal state or not;
the data block searching module is used for searching the latest snapshot data block corresponding to the target data block from the snapshot data block set when the current state information is determined to be in an abnormal state; the snapshot data block set is stored with all snapshot data blocks obtained by performing snapshot operation on the target data block according to a preset modification step length;
and the data block recovery module is used for performing recovery operation on the target data block by using the latest snapshot data block.
7. The data recovery apparatus according to claim 6, wherein the information obtaining module is specifically a module that obtains an actual MD5 value of the target data block;
the judging module comprises:
the value acquisition submodule is used for acquiring a preset MD5 value;
and the judgment submodule is used for judging whether the actual MD5 value is consistent with the preset MD5 value.
8. The data recovery apparatus of claim 6, wherein the data block recovery module comprises:
the log obtaining submodule is used for obtaining a target stage operation log corresponding to the target data block from the latest snapshot data block;
and the data block recovery submodule is used for performing corresponding operation on the latest snapshot data block according to the target stage operation log so as to recover the target data block.
9. A data recovery apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the data recovery method according to any one of claims 1 to 5 when executing said computer program.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the data recovery method according to any one of claims 1 to 5.
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| CN202011401006.1A CN112527557A (en) | 2020-12-04 | 2020-12-04 | Data recovery method, device and equipment and computer readable storage medium |
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| CN202011401006.1A CN112527557A (en) | 2020-12-04 | 2020-12-04 | Data recovery method, device and equipment and computer readable storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114218018A (en) * | 2022-02-18 | 2022-03-22 | 深圳佰维存储科技股份有限公司 | System data protection method and device, readable storage medium and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114218018A (en) * | 2022-02-18 | 2022-03-22 | 深圳佰维存储科技股份有限公司 | System data protection method and device, readable storage medium and electronic equipment |
| CN114218018B (en) * | 2022-02-18 | 2022-05-27 | 深圳佰维存储科技股份有限公司 | System data protection method and device, readable storage medium and electronic equipment |
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Application publication date: 20210319 |